Hauling-through conduit system



(No Model.)

J. P. MUNSIE.

HAULING THROUGH GONDUIT SYSTEMS.

N. PETERS. mwmlvqrawr. wvl-Mum. n. c.

UNITED STATES PATENT OEEICE.

JAMES F. MUNSIE, OF CHICAGO, ILLINOIS.

HAULiNG-TH ROUGH CONDUlT SYSTEM.

SPECIFICATION forming part of Letters Patent No, 371,965, dated October 25, 188.7.

Application tiled December 30, 1886. Serial No. 223,009. (No medel.)

To @ZZ whom it may concern:

Be it known that I, JAMEs F. MUNsIE, a sub- Ject ofthe Queen of Great Britain, residing at Chicago,inthe county of Cook and State of Illinois, have invented certain new and useful Improvements in Hauling-Through Conduit Systems; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use thesame.

My invention is designed, principally, to facilitate the insertion of electric cables into underground conduits and insuretheir ready removal therefrom, the operations being effected with the expenditure of comparatively little force, With celerity, and Without undue Wear upon the external coating or envelope of the cables themselves, or upon the inner surface ofthe conduits employed. In the accomplishnient of these purposes I have devised the eenstruction and arrangement of parts illustrated in the accompanying` drawings, wherein- Figure l represents a central vertical longitudinal section of my improved conduit and its appurtenances, illustrating the location of the various parts after insertion of the cable. Fig. 2 represents ahorizontal longitudinal section of the-same. Fig. 3 represents a vertical cross-section thereof, andA Fig. 4 represents a detached plan view of the removable cable-bed prior te employing the same for the removal of the cable.

Similar letters of reference indicate similar parts throughout the several Views.

rIhe conduit itself is composed 'of a series of conduit-sections, as A, all preferably of equal `length and having a longitudinal chamber, E,

at their lower portion, as shown. Externally the sections A, which may be of glazed earthenware or the like, are enveloped first in a cover of paper, k, outside of which isa further envelope or covering of wire-gauze or the like, 7s', protected from the moisture ofthe earth, m, by an intermediate layer of asphalt, tar, or equivalent substance. The presence ofthe paper envelope k prevents any possible moisture from the interior of the conduit striking the Wire-gauze, and the paper and asphalt covering combined prevent the access of moisture from the earth to the interior of the conduit.

Ain ,the drawings.

I do not claim herein the construction described fer protecting the conduit from penetration of moisture from without and for grounding induced currents, as suelnconstruction is made the subject-matter ot' a separate application filed by me March 9, 1h87, Serial Theiusertion and removal oftlieeleetriccable is effected by means of the cable-bed illustrated This consists, primarily, of a series of rollers connected together by the chain D or the like, so as to be adapted to be wound upon a Windlass, reel, or drum. Each of these rollers consists of a central shaft, H, bearing at its outer ends the revoluble rollers F and the intermediate loose spools,F,capable of independent rotation with respect to each other and separated by intervening washers h. The extreme ends of the chains terminate in half links or hooks n, as shown. At the end of the conduit is located a sheave, c, mounted upon a shaft, f.

In the operation of inserting a cable, as B, within the underground conduit, I avail myself of the device C, consisting of a metallic cap hollowed out internally and provided with the perforated projection g2, for attachment of a hauling-rope, d, the lower perforated lug, g, for the attachment of a trailing cable, g', and the side lugs, hh, for the reception of the halflink ends a of the chains, said half-links being retained therein by means of the bindingscrews z'. The cable B is retained Within the hollow cap c by means of the binding-screws c', or their equivalents.

In carrying out my invention the rope-d, which is originally contained within the chamber E, is connected With the bail g2 of the piece C. The cable, the chains, and the trailing rope g are connected to the piece C, as illustrated in Fig. 1, and the rope d is thereupon hauled through the conduit-section, drawing after it the cable, trailing rope, and removable cable-bed. During this operation the Wheels F of the removable cable-bed rotate, thereby insuring the rapid passage of the cable through the conduit with comparatively small expenditure of power and without injury to the interior surfaces of the conduit. Vhen the cable is eompletel y drawn through the section, the cable itself and the rope g IOO are detachedfrom the piece C, whereupon the roller-bed is drawn out from under the cable and wound upon a reel or the like for future use. The cable itself rests within the conduit above the chamber E, the upper corners or edges of said chamber being rounded off, as shown. so as not to abrade the cable-covering. rIhe chamber E, it will be noted, communicates with the main body-of the conduit by an opening of less width than the diameter' of the conducting-cable, thereby preventing said cable from falling into the chamber E, so as to interfere with the trailing rope g.

XVlicn it is desired to remove the cable from the conduit, one end of the trailing rope r/ is connected to the removable cable-bed, as illustrated in Fig. 4, and by means of the said rope the cable-bed is drawn beneath the cable until it supports the latter throughout its entire eX- tent. rIhe cable may then be withdrawn by hauling it through the conduit over the surface of the cable-bed, whose intermediate roll ers revolve during such hauling operation, thereby taking ott' all strain from the cable` envelope. The roller-bed may then be removed, as before.

In constructing new systems in accordance with my invention I prefer to have all the couduit-sections of substantially equal length, so that the same length of roller-bed and trailing rope will suliice for each. It is obvious, however, that the invention may be applied to sections of unequal length with like good results.

IIaving thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

l. In a conduit system for electric conductors, the combination, with the conduit and the cable, of a removable cablebed for facilitating the insertion and removal of the cable, substantially as described.

2. In a conduit system for electric conductors, the combination, with a hauling-cable provided with means for connecting the electric cable therewith, of a removable rollcrbed, substantially as described.

3. In a conduit system for electric conductors, the combination, with a haulingeable provided with means for connecting the electric cable therewith, of a removable roller-bed and a trailing rope, substantially as described.

4. In a conduit system for electric conduct` ors, the combination, with a hauling-cable, of a removable roller-bed having carrier-wheels and independently revolving intermediate spools, substantially as described.

5. In a conduit system for electric cond uctors, the combination, with a trailing rope, g', electric cable B, and removable roller-bed D, of the piece C and hauling-cable d, substantially as described.

6. An underground conduit provided with a longitudinal chamber, E, communicating therewith by an opening of less width than the diameter of the cable contained in the conduit, and a rope located within said chamber E, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES F. MUNSIE.

Witnesses:

JOHN C. PnNNrr., E. T. WHITE. 

